Diffusers from PTFE sheet?

[gerrit]

@filip.ayazi

I got reasonably ok cuts by playing with the laser settings (going somewhat fast (50mm/s) with a slight overcut and just enough power to cut through), but the edges still curve up a bit. The sheet also tends to curve up while cutting, last time I did it I used a large piece of acrylic with a hole approximately the size of the grid of diffusers to hold it down all around the piece.

I ran into the same issues. Even with optimal settings, the PP sheet still melts and curves up a bit. For the whole sheet curving up, I even tried sticking it down to some MDF (also to a metal grill) using double-sided tape (also tried glue stick), but that just left a mess when burn marks transferred onto the PP plastic. I like your acrylic weight idea!

@WilliamW

So in answer to your question, an appropriate type of PTFE sheet should work, but we have not tested any.

I would be happy to send a couple of folks in the UK a 0.25mm PTFE diffuser who wants to try them out for free? Just send me your address via DM.